Uninterruptible power supply



FIG. 1 is a front perspective view of the uninterruptible power supply showing our design;

FIG. 2 is front view thereof;

FIG. 3 is back view, opposite the front view of FIG. 2;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof, opposite that shown in FIG. 4;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings illustrate portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an uninterruptible power supply, as shown and described. 